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PyScript Lets Developers Run Real Python in Browsers via WebAssembly

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PyScript is an open-source platform built by Anaconda, Inc. and first introduced at PyCon US 2022 by CEO Peter Wang, enabling Python code to run directly inside web browsers. It works through WebAssembly (WASM) rather than transpilation, offering two interpreter options: the full CPython runtime via Pyodide, and the lightweight MicroPython at roughly 170KB. Developers can embed Python in HTML pages without any build tools, and a bi-directional Foreign Function Interface (FFI) allows Python to call browser JavaScript APIs and vice versa. PyScript also supports PyPI package installation, Web Workers for background computation, and ships built-in interactive components including a REPL terminal and a CodeMirror-powered code editor. The platform is designed for use cases ranging from data science applications to educational tools, all without requiring a backend server.

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